What is CVE-2026-21942?

CVE-2026-21942 is a medium-severity vulnerability in Oracle Solaris, classified under Uncontrolled Resource Consumption. CVSS score: 5.0/10. Published 2026-01-20.

How severe is CVE-2026-21942?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Resource exhaustion in Oracle Solaris

CVE-2026-21942

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Filesystems). Supported versions that are affected are 10 and 11. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Solaris. CVSS 3.1 Base Score 5.0 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H).

Vulnerability class: DoS (Denial of Service)

EPSS: 0.001 (1.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H.

Affected products

Oracle Solaris — versions 10, 11
Oracle Corporation Solaris — versions 10, 11

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

secalert_us@oracle.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-21942?: CVE-2026-21942 is a medium-severity vulnerability in Oracle Solaris, classified under Uncontrolled Resource Consumption. CVSS score: 5.0/10. Published 2026-01-20.
How severe is CVE-2026-21942?: Medium severity. CVSS v3 base score is 5.0 out of 10.